Michael Harding Oil Painting Medium is designed to enhance the pigment in such a way that it has increased depth and transparency. Oil painting medium will also act to improve flow of the paint and increase gloss. Michael Harding oil paint mediums have been developed to enhance and facilitate the effects of known oil paint techniques. Throughout history painters have always manipulated paint in search of the perfect paint film and finish. Michael Harding Oil Mediums are fully compatible with Michael Harding oil paints and can guarantee long-term stability.